<!-- 单文件组件login -->
<template>
	<div class="a">
		<div class="login_container">
			<div class="login_box">
				<!-- 头像区域 -->
				<div class="avatar_box">
					<img src="../assets/logo.png" alt="">
				</div>
				<!-- 登陆表单区域 -->
				<el-form ref="loginFormRef" :model="loginForm" :rules="loginLoginRules" label-width="0px" class="login_form">
					<!-- 用户名 -->
				  <el-form-item prop="username">
				    <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
				  </el-form-item>
				  <!-- 密码 -->
				  <el-form-item prop="password">
				    <el-input type="password" prefix-icon="iconfont icon-3702mima" v-model="loginForm.password"></el-input>
				  </el-form-item>
				  <!-- 按钮区域 -->
				  <el-form-item  class="btn">
				    <el-button type="primary" @click="login">登陆</el-button>
					<el-button type="primary" @click="resetLoginForm">重置</el-button>
				  </el-form-item>
				</el-form>
			</div>
		</div>
	</div>
</template>

<script>
	//把这个组件中的对象导出
	export default{
		data(){
			return{
				//这是登陆表单的数据绑定
				loginForm:{
					username:'admin',
					password:'123456'
				},
				//这是表单的验证规则对象
				loginLoginRules: {
					//验证用户名是否合法
					username:[
						{ required: true, message: '请输入用户名称', trigger: 'blur' },
						{ min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
					],
					//验证密码是否合法
					password:[
						{ required: true, message: '请输入用户密码', trigger: 'blur' },
						{ min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
					]
				}
			}
		},
		methods:{
			//点击重置表单
			resetLoginForm(){
				// console.log(this)
				//获取对应的元素，执行element中定义好的.resetFields()方法
				this.$refs.loginFormRef.resetFields()
			},
			login:function(){
				//接收一个回调函数，参数是布尔值，代表预验证是否合法
				this.$refs.loginFormRef.validate(async val=>{
					if(!val) return
					const {data:res}=await this.$http.post('login',this.loginForm)
					if(res.meta.status !==200) return this.$message.error("登陆失败")
					this.$message.success("登陆成功啦")
					//将token保存到sessionStorage中
					window.sessionStorage.setItem('token',res.data.token)
					//编程式导航，实现页面的跳转
					this.$router.push('/home')
				})
			}
		}
	}
</script>
<!-- 支持less，组件内生效 -->
<style lang="less" scoped>
	.a{
		height: 100%;

	}
	.login_container{
		background-color: #2b4b6b;
		height: 100%;
		overflow: hidden;
		.login_box{
			width: 450px;
			height: 300px;
			background-color: #fff;
			border-radius: 3px;
			position: absolute;
			left: 50%;
			top: 50%;
			transform: translate(-225px,-150px);
			.avatar_box{
				height: 130px;
				width: 130px;
				border: 1px solid #eee;
				border-radius: 50%;
				padding: 10px;
				box-shadow: 0 0 10px #ddd;
				position: absolute;
				left: 50%;
				transform: translate(-50%,-50%);
				background-color: #fff;
				img{
					width: 100%;
					height: 100%;
					border-radius: 50%;
					background-color: #eee;
				}
			}
		}
	}
	.login_form{
		position: absolute;
		bottom: 0;
		width: 100%;
		box-sizing: border-box;
		padding: 0 20px;
	}
	.btn{
		display: flex;
		justify-content: flex-end;
	}
	
</style>
